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Master A

4-0-3

Humboldt Nutrients Master A&B is a premium two-part fertilizer program designed for all plants and made with the highest quality mineral ingredients. What sets the Master Series apart from it’s peers is the amino chelation of heavy metal micronutrient content. Other synthetic 2-part and 3-part programs use cheaper imported chinese chemical chelating agents called EDTA and EHDDA, to make micronutrients available. These are highly toxic chemicals and are not good for our soils, waterways, or human health. By using natural amino acids to make all of the micronutrient content available in the Master A&B, we have made it 100% biodegradeable, which is more sustainable environmentally, without sacrificing efficacy or affordability.


Retail Prices

  • 16oz – $13.94
  • 32oz – $24.34
  • 1gal – $73.00
  • 2.5gal – $152.08
  • 5gal – $267.70
  • 15gal – $682.64

Guaranteed Analysis

Total Nitrogen (N)……………………………..………………….…..4.00%
0.80% Ammoniacal Nitrogen
3.20% Nitrate Nitrogen
Soluble Potash (K20)………………………………………………….3.00%
Calcium (Ca)………………………….………………………………….1.70%
Zinc (Zn)……………………………………………………………….0.05%
0.05% Water Soluble Zinc

Derived From: Ammonium nitrate, Potassium nitrate, Calcium nitrate, Sodium molybdate, Calcium carbonate, and Zinc sulfate.


Directions

Fill your reservoir with clean water before administering any nutrient or additive. Make sure that the water level in your reservoir is sufficient enough to effectively flood your desired area or table.  Potential nutrient lock-out can be avoided by adding Master A to your reservoir first and thoroughly mixing it in, then add Master B.  Never mix these nutrients together in their concentrated forms.  After adding in each nutrient adjust the pH of your reservoir between 5.5 and 6.5.  Keep the water temperature in your reservoir between 65 and 75 °F.  Drain and clean your reservoir and pumps at least once a week to prevent any salt buildup.  Avoid storing in direct sunlight and protect from freezing.

Application Rates:

MASTER A           MASTER B

GROWTH STAGE
1ML/L                   0.5ML/L

FLOWERING (EARLY/TRANSITION)
1ML/L                   1ML/L

FULL BLOOM (FRUITING STAGE WEEK 4-8)
2ML/L                   2ML/L

Foliar Application: Apply at a rate of 5ml per gallon of finished spray solution.

Please note: These application rates apply only when using Master A&B alone. If using as part of a feeding program please refer to the Humboldt Nutrients feeding charts.

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